% of shares outstanding not shown: no SEC cover-page share count falls within 120 days of the 2026-Q1 quarter end, so any percentage would rest on a count that cannot speak for this quarter. Holder share counts are shown as filed.
Crowding percentile withheld — no market cap for SDSTW in the served universe — the cohort is size-matched, and an unmatched percentile would compare a micro-cap register to a mega-cap one.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | ARISTEIA CAPITAL, L.L.C. | 290,258290,258 | $49,852 | — | — |
| 2 | Clear Street Group Inc. | 195,202195,202 | $31,994 | — | — |
| 3 | Athos Capital Ltd | 11,37811,378 | $27,000 | — | — |
| 4 | Davidson Kempner Capital Management LP | 83,33283,332 | $13,658 | — | — |
| 5 | MOORE CAPITAL MANAGEMENT, LP | 58,33358,333 | $9,561 | — | — |
| 6 | TENOR CAPITAL MANAGEMENT Co., L.P. | 49,43249,432 | $8,102 | — | — |
| 7 | RIVERNORTH CAPITAL MANAGEMENT, LLC | 38,41538,415 | $6,296 | — | — |
| 8 | Schonfeld Strategic Advisors LLC | 37,40037,400 | $6,129 | — | NEW |
| 9 | LMR Partners LLP | 29,16729,167 | $4,780 | — | — |
| 10 | JANE STREET GROUP, LLC | 26,53226,532 | $4,349 | — | — |
| 11 | P SCHOENFELD ASSET MANAGEMENT LP | 24,76624,766 | $4,059 | — | — |
| 12 | Blue Owl Capital Holdings LP | 16,66616,666 | $2,667 | — | TRIM -47% |
| 13 | Creek Drive Management Group LLC | 15,03715,037 | $2,465 | — | — |
| 14 | DUPONT CAPITAL MANAGEMENT CORP | 12,50012,500 | $2,255 | — | — |
| 15 | TORONTO DOMINION BANK | 13,30013,300 | $2,181 | — | — |
| 16 | OMERS ADMINISTRATION Corp | 11,66611,666 | $2,105 | — | — |
| 17 | TWO SIGMA SECURITIES, LLC | 12,23912,239 | $2,006 | — | NEW |
| 18 | Virtu Financial LLC | 10,77110,771 | $2,000 | — | NEW |
| 19 | UBS Group AG | 6,0226,022 | $988 | — | ADD 71% |
Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| ARISTEIA CAPITAL, L.L.C. | 171K | 168K | 168K | 168K | 290K | 290K | $49,852 |
| Clear Street Group Inc. | — | — | — | 196K | 196K | 195K | $31,994 |
| Athos Capital Ltd | 11K | 11K | 11K | 11K | 11K | 11K | $27,000 |
| Davidson Kempner Capital Management LP | 83K | 83K | 83K | 83K | 83K | 83K | $13,658 |
| MOORE CAPITAL MANAGEMENT, LP | 58K | 58K | 58K | 58K | 58K | 58K | $9,561 |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 49K | 49K | 49K | 49K | 49K | 49K | $8,102 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 38K | 38K | 38K | 38K | 38K | 38K | $6,296 |
| Schonfeld Strategic Advisors LLC | — | — | — | — | — | 37K | $6,129 |
| LMR Partners LLP | 29K | 29K | 29K | 29K | 29K | 29K | $4,780 |
| JANE STREET GROUP, LLC | 27K | 27K | 27K | 27K | 27K | 27K | $4,349 |
| P SCHOENFELD ASSET MANAGEMENT LP | 25K | 25K | 25K | 25K | 25K | 25K | $4,059 |
| Blue Owl Capital Holdings LP | 17K | 17K | 17K | 17K | 32K | 17K | $2,667 |
| Creek Drive Management Group LLC | — | — | — | — | 15K | 15K | $2,465 |
| DUPONT CAPITAL MANAGEMENT CORP | 13K | 13K | 13K | 13K | 13K | 13K | $2,255 |
| TORONTO DOMINION BANK | — | — | 13K | 13K | 13K | 13K | $2,181 |
Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.
Holder count only — too few computable %-of-shares-outstanding quarters for a % pane. Line breaks are quarters with no 13F record, never interpolated.
| Quarter | Holders | Shares held | % shares out | Value held |
|---|---|---|---|---|
| 2026-Q1 | 19 | 942,416 | — | $182,447 |
| 2025-Q4 | 17 | 895,065 | — | $121,596 |
| 2025-Q3 | 15 | 786,216 | — | $93,073 |
| 2025-Q2 | 20 | 1,117,378 | — | $29,509 |
| 2025-Q1 | 18 | 1,039,455 | — | $73,694 |
| 2024-Q4 | 21 | 1,249,973 | — | $361,658 |
| 2024-Q3 | 23 | 1,187,771 | — | $602,544 |
Short interest has its own tab now — open SI →
Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| Schonfeld Strategic Advisors LLC | +37,400 | — | OPEN |
| TWO SIGMA SECURITIES, LLC | +12,239 | — | OPEN |
| Virtu Financial LLC | +10,771 | — | OPEN |
| UBS Group AG | +2,507 | — | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| Blue Owl Capital Holdings LP | −15,000 | — | TRIM |
| Clear Street Group Inc. | −300 | — | — |
| BANK OF AMERICA CORP /DE/ | −266 | — | CLOSE |
The 2025-Q4 register is as-filed in ITS OWN share basis; every count below was rebased into the 2026-Q1 basis (no split in between, factor 1). Dollar figures value the SHARE delta at one price — the quarter-end close — rather than differencing two filings' own reported values, which would mix the quarter's price move into the trade figure. No licensed quarter-end close is stored for this line, so the dollar columns are withheld; share counts stand.
13Fs disclose LONG US-listed positions only — shorts, most derivatives, bonds and non-US listings are invisible here, and a filer's quarter-over-quarter change is not necessarily a trade (index rebalances, in-kind transfers and entity successions all read as flow).
